1：環境介紹
郵件服務器IP： 192.168.50.24/24，主機名爲rhel6.766.com，因爲懶得去配dns，這裏就用hosts文件來代替解析
客戶端1 IP： 192.168.50.211/24，FreeBSD 8.1,使用telnet收信
客戶端2 IP: 192.168.50.40/24, Win7，使用foxmail收發郵件
[root@rhel6 ~]# hostname
rhel6.766.com
[root@rhel6 ~]# cat /etc/hosts
192.168.50.24 rhel6.766.com rhel6
127.0.0.1 localhost.localdomain localhost
2：安裝postfix和dovecot軟件包，這裏爲了省事，就採用rpm包方式安裝，後期可以去研究研究如何編譯使用，rhel6默認已經安裝好了postfix,所以只需要安裝dovecot即可
[root@rhel6 ~]# rpm -qa |grep -E 'postfix|dovecot|sendmail +'
postfix-2.6.6-2.el6.x86_64
dovecot-2.0-0.10.beta6.20100630.el6.x86_64
3：修改postfix主配置文件如下，各配置項的具體含義可以參考手冊和註釋
[root@rhel6 ~]# grep -v '^#' /etc/postfix/main.cf |grep -v '^$'
queue_directory = /var/spool/postfix
command_directory = /usr/sbin
daemon_directory = /usr/libexec/postfix
data_directory = /var/lib/postfix
mail_owner = postfix
mydomain = rhel6.766.com //指定郵件域
myorigin = $mydomain
inet_interfaces = all
inet_protocols = all
mydestination = $myhostname, localhost.$mydomain, localhost
unknown_local_recipient_reject_code = 550
mynetworks_style = subnet
mynetworks = 192.168.50.0/24, 127.0.0.0/8 //指定允許中繼的IP地址段
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
debug_peer_level = 2
debugger_command =
PATH=/bin:/usr/bin:/usr/local/bin:/usr/X11R6/bin
ddd $daemon_directory/$process_name $process_id & sleep 5
sendmail_path = /usr/sbin/sendmail.postfix
newaliases_path = /usr/bin/newaliases.postfix
mailq_path = /usr/bin/mailq.postfix
setgid_group = postdrop
html_directory = no
manpage_directory = /usr/share/man
sample_directory = /usr/share/doc/postfix-2.6.6/samples
readme_directory = /usr/share/doc/postfix-2.6.6/README_FILES
[root@rhel6 ~]# service postfix start
啓動 postfix： [確定]
本地發信測試
[root@rhel6 ~]# mail -s 'Postfix1'[email protected]< /etc/hosts
win7客戶端測試：
4：修改dovecot主配置文件如下
[root@rhel6 ~]# grep -v '^#' /etc/dovecot/dovecot.conf |grep -v '^$' |grep -v '#'
!include conf.d/*.conf //該配置項說明conf.d下的所以conf結尾的文件均有效，注意最前面的"!"號
protocols = imap pop3 lmtp
login_trusted_networks = 192.168.50.0/24 //指定允許登錄的網段地址
dict {
}
若未設置login_trusted_networks參數值，使用telnet登錄110端口，將會出現如下錯誤，不知道這個值能不能設置爲四個零，這個還有待測試…
freebsd# telnet 192.168.50.24 110
Trying 192.168.50.24...
Connected to 192.168.50.24.
Escape character is '^]'.
+OK Dovecot ready. <[email protected]>
user oracle
-ERR Plaintext authentication disallowed on non-secure (SSL/TLS) connections.
pass oracle
-ERR Plaintext authentication disallowed on non-secure (SSL/TLS) connections.
quit
+OK Logging out
Connection closed by foreign host.
[root@rhel6 ~]# tail -f /var/log/maillog
Dec 21 16:51:00 rhel6 dovecot: pop3-login: Aborted login (tried to use disabled plaintext auth): rip=192.168.50.211, lip=192.168.50.24, mpid=0
5：設置/etc/dovecot/conf.d/10-mail.conf配置文件如下：
[root@rhel6 ~]# grep -v '^#' /etc/dovecot/conf.d/10-mail.conf |grep -v '^$' |grep -v '#'
mail_location = mbox:~/mail:INBOX=/var/mail/%u
mbox_write_locks = fcntl
如未設置mail_location參數值，將會出現如下錯誤：
freebsd# telnet 192.168.50.24 110
Trying 192.168.50.24...
Connected to 192.168.50.24.
Escape character is '^]'.
+OK Dovecot ready. <2656.1.4d106ad9.Ovoh/[email protected]>
user oracle
+OK
pass oracle
Connection closed by foreign host.
[root@rhel6 ~]# tail -f /var/log/maillog
Dec 21 16:52:50 rhel6 dovecot: pop3-login: Login: user=<oracle>, method=PLAIN, rip=192.168.50.211, lip=192.168.50.24, mpid=9826, secured
Dec 21 16:52:50 rhel6 dovecot: pop3(oracle): Error: user oracle: Initialization failed: mail_location not set and autodetection failed: Mail storage autodetection failed with
home=/u01/oracle
Dec 21 16:52:50 rhel6 dovecot: pop3(oracle): Error: Invalid user settings. Refer to server log for more information.
設置完mail_location值後，需要重啓dovecot服務，同時需要創建相關的目錄，否則還會出現如下錯誤
freebsd# telnet 192.168.50.24 110
Trying 192.168.50.24...
Connected to 192.168.50.24.
Escape character is '^]'.
+OK Dovecot ready. <[email protected]>
user oracle
+OK
pass oracle
-ERR [IN-USE] Couldn't open INBOX: Internal error occurred. Refer to server log for more information. [2010-12-21 16:56:40]
Connection closed by foreign host.
[root@rhel6 ~]# tail -f /var/log/maillog
Dec 21 16:56:40 rhel6 dovecot: pop3-login: Login: user=<oracle>, method=PLAIN, rip=192.168.50.211, lip=192.168.50.24, mpid=10115, secured
Dec 21 16:56:41 rhel6 dovecot: pop3(oracle): Error: chown(/u01/oracle/mail/.imap/INBOX, -1, 12(mail)) failed: Operation not permitted (egid=501(dba), group based on
/var/mail/oracle)
Dec 21 16:56:41 rhel6 dovecot: pop3(oracle): Error: mkdir(/u01/oracle/mail/.imap/INBOX) failed: Operation not permitted
Dec 21 16:56:41 rhel6 dovecot: pop3(oracle): Error: Couldn't open INBOX: Internal error occurred. Refer to server log for more information. [2010-12-21 16:56:40]
Dec 21 16:56:41 rhel6 dovecot: pop3(oracle): Couldn't open INBOX top=0/0, retr=0/0, del=0/0, size=0
[root@rhel6 ~]# su - oracle
[oracle@rhel6 ~]$ mkdir -p /u01/oracle/mail/.imap/INBOX
[oracle@rhel6 ~]$ exit
logout
[root@rhel6 ~]# mail -s 'Postfix mail test'[email protected]< /etc/hosts
freebsd# telnet 192.168.50.24 110
Trying 192.168.50.24...
Connected to 192.168.50.24.
Escape character is '^]'.
+OK Dovecot ready. <2867.1.4d106ca7.L311rFiY7/[email protected]>
user oracle
+OK
pass oracle
+OK Logged in.
list
+OK 5 messages:
1 672
6：爲了使新創建的用戶可以自動創建這個目錄，可以修改/etc/skel/.bash_profile文件如下
[root@rhel6 ~]# tail -4 /etc/skel/.bash_profile
if [ ! -d ~/mail/.imap/INBOX ];then
mkdir -p ~/mail/.imap/INBOX
fi
7：新建一個用戶，並在win7 客戶端收信測試
[root@rhel6 ~]# useradd tiger
[root@rhel6 ~]# echo '123456' |passwd --stdin tiger
更改用戶 tiger 的密碼 。
passwd： 所有的身份驗證令牌已經成功更新。
[root@rhel6 ~]# mail -s 'tiger'[email protected]< /etc/issue.net
vvvv